泡沫型重油油藏水平井流入动态  

Horizontal well inflow performance relationship in foamy heavy oil reservoirs

作　　者：陈亚强[1] 穆龙新[1] 张建英[1] 翟光华[1] 李星民[1] 李剑[1] 翟慧颖 

机构地区：[1]中国石油勘探开发研究院 [2]中海油监督监理技术公司

出　　处：《石油勘探与开发》2013年第3期363-366,共4页Petroleum Exploration and Development

基　　金：国家科技重大专项"重油油藏和油砂经济高效开发技术"(2011ZX05032-001)

摘　　要：基于泡沫型重油油藏开采特征、油气相渗规律及驱油机理,采用多组分数值模拟和油藏工程相结合的方法,研究该类油藏水平井流入动态关系,提出了该类油藏水平井无因次IPR曲线相关式。通过泡沫油多组分数值模拟,得到泡沫型重油油藏水平井IPR曲线:平均地层压力较高时,IPR曲线右端略微上翘,表现出泡沫油的特性;随着平均地层压力的下降,开始表现出常规溶解气驱油藏的特征。将泡沫型重油油藏与常规溶解气驱油藏的无因次IPR曲线进行对比后发现:无因次压力较高时,此2类油藏的无因次压力与无因次产油量间基本都呈线性关系;无因次压力较低时,前者右端略微向上弯曲,后者右端向下弯曲。采用泡沫型重油油藏水平井无因次IPR曲线相关式计算的产油量与现场实际产油量相对误差在13%以内,可用于指导该类油藏的冷采开发。Based on the recovery feature, oil and gas relative permeability law and driving mechanism of foamy heavy oil reservoirs, inflow performance relationship of horizontal wells in this kind of reservoirs was studied using multi-component numerical simulation and reservoir engineering methods. A dimensionless IPR equation of horizontal wells in foamy heavy oil reservoirs was also presented. Applying foamy oil multi-component numerical simulation, the IPR curve of horizontal wells in foamy heavy oil reservoirs was obtained： when the average formation pressure is high, the right end of the IPR curve is slightly upturned which shows foamy oil characteristics; with the decrease of average formation pressure, the characteristics of conventional solution-gas-drive reservoirs begin to appear. After comparing the dimensionless IPR curve of foamy heavy oil reservoirs with that of conventional solution-gas-drive reservoirs, it was found that： when dimensionless pressure is high, for both of these two kinds of reservoirs, dimensionless pressure and dimensionless oil production basically display linear relationship; when dimensionless pressure is low, the right end of the IPR curve of foamy heavy oil reservoirs is slightly upturned and that of conventional solution-gas-drive reservoirs is downturned. The relative error between the oil production calculated by the dimensionless IPR equation of horizontal wells in foamy heavy oil reservoirs and actual oil production is less than 13%. This research result can be used to direct the development of foamy heavy oil reservoirs.

关 键 词：泡沫型重油 水平井 流入动态 IPR曲线 

分 类 号：TE345[石油与天然气工程—油气田开发工程]